The reddish ants have ocelli. My guess is toward a workerless (cookie-can?) parasite species. And based on geographical distribution (France, maybe), it could be a Formica or Leptothorax. Ignoring the clypeal denticles and astonishing head type, of course.

But doing this kind of ID attempt I’ll taking off the fiction pleasure of the movie… The parrot-like call done by the “marauder” chief was awesome. Hahaha!